Upgraded to Cubase 8, can't use 6.5 anymore

Cubase 8 works fine, but when I try to load 6.5, I get the following error:

Application ‘Cubase / Cubase Artist’ has caused the following error:
An important service has become unresponsive.
Please restart your computer to fix this problem.
Please visit <www.eLicenser.net> to download and install the latest version of the eLicenser Control software in case the problem persists.

For some reason, 6.5 no longer shows up in my eLicenser. I need to open up a project in 6.5, because it doesn’t seem to want to open up in 8.

Cubase 6.5 shouldn’t be visible in your eLCC. The licence jas been upgraded to Cubase Pro 8 licence. You don’t have two licences (C6.5 & C8).

But you should be able to run your acubase 6.5 with Cubase Pro 8 licence.

Do you have the latest eLCC version installed?